JPH08331629A - Cordless telephone system - Google Patents

Abstract

PURPOSE: To reduce power consumption by efficiently selecting a channel by providing two channel groups which can be used for speaking only when they are not used by other equipment or regardlessly of the use of equipment, storage means for them, discriminating means for use and control means. CONSTITUTION: A channel matrix (CH.MX) between a base unit and a hand set in the cordless telephone system is stored in the storage means (ROM). The first channel (CH) group can be used for speaking only when it is not used by the other equipment, and is provided with groups A and B, and a group C that can be used regardlessly of the use of the other equipment. Further, A third CH group H (D) is provided with the same factor as the group C and added to the last column of the CH.MX. In the scan of the base unit, PLL- DATA are outputted from a CPU 121 to a synthesizer 104, squelch check is performed after the lapse of prescribed time, and it is discriminated whether that CH is idle or occupied. When it is idle, a scan operation is repeatedly performed from the group A to the group C. Concerning the scan operation of the hand set, it is performed while limiting the candidate of CH selection for one row of CH.MX, namely, for each CH in the groups A-C.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cordless telephone device having a master unit and a slave unit, and in particular, based on a new FCC standard, a selected channel candidate is divided into a plurality of channel groups of old and new, and the plurality of channel groups are divided into a plurality of groups. By changing the priority of channel selection in connection operation and the channel selection method according to the channel group, it is possible to efficiently select channels in accordance with the new FCC standard, and scan channels in channel selection operation. The present invention relates to a cordless telephone device that efficiently operates and reduces power consumption in combination with intermittent operation of scanning operation.

[0002]

2. Description of the Related Art Conventional 46 [MHz] and 49 [MH]
In the cordless telephone device that used the frequency band of z], the FCC (Federal Communications Commissio)
n) According to the standard, the number of channels that can be used for communication between the master and slaves was limited to 10. However, the FCC standard that will take effect on June 5, 1995 will allow the use of 15 new channels, and there is a demand for the design and development of a cordless telephone device that complies with the new standard. It should be noted that some of the new 15 channels have been conventionally used in other wireless devices (commercial wireless devices, etc.) other than the cordless telephone device.

[0003]

Regarding the 15 channels that can be newly used in this new FCC standard, when those channels are used by other wireless devices other than the cordless telephone device which is the own device, that is, , There is a restriction that it should not be used when it is used in other cordless telephone devices and commercial wireless devices, etc., and there are 15 new restrictions on connection operation between the master unit and the slave unit. There is a problem that the connection method in the conventional cordless telephone device cannot be used as it is for the channel and the 10 old channels without restrictions, because it is necessary to take care such as changing the priority order of channel selection.

Further, in order to reduce power consumption in the channel selection operation, it is general to intermittently perform a scan operation for finding an empty channel, but the number of channels to be scanned increases from 10 to 25. Accompanied by,
There was also the problem that the processing time for scanning all channels increased, and the effect of intermittent operation decreased.

The present invention has been made in view of the above-mentioned conventional problems, and is divided into a plurality of channel groups of old and new based on the new FCC standard, and a connection operation is performed according to the plurality of channel groups. By changing the priority of channel selection and the channel selection method in
It is an object of the present invention to provide a cordless telephone device that can efficiently select a channel according to the new FCC standard.

Another object of the present invention is to provide a cordless telephone device which can efficiently perform a channel scanning operation in a channel selection operation and reduce power consumption in combination with an intermittent operation of the scanning operation. is there.

[0007]

In order to solve the above problems, a cordless telephone device according to claim 1 of the present invention comprises a master unit and a slave unit, and a call is made between the master unit and the slave unit. In a cordless telephone device that selects one channel from a plurality of channels that are allowed to be used for making a call using the selected channel, the plurality of channels are used by another device. A first channel group that is allowed to be used for the call of the cordless telephone device only when there is no such device, and a second channel group that can be used for the call of the cordless telephone device regardless of the use of the other device. A second unit that stores a plurality of channels belonging to the first channel group and a plurality of channels belonging to the second channel group. Storage means, determination means for determining whether or not the designated channel is used by the other device, and belonging to the first channel group held in the first storage means prior to the call. If at least one of a plurality of channels is designated and the determination unit is requested to make a determination, and it is determined that the designated channel is not used by the other device, the designated channel is selected, Otherwise, it comprises a control means for selecting one of a plurality of channels belonging to the second channel group held in the first storage means.

A cordless telephone device according to a second aspect is the cordless telephone device according to the first aspect, wherein the plurality of channels have a first row in the first channel group,
The second column is the second channel group, and the second column is associated with a channel matrix having a designated group number and held in the first storage means, and the master unit and / or the slave unit are assigned to the designated group. A second storage means for holding a number, wherein the control means designates a channel which is an element of a row corresponding to the designated group number held in the second storage means in the first column of the channel matrix. Then, the determination means is requested to make a determination, and when it is determined that the designated channel is not used by the other device, the designated channel is selected, otherwise, the second channel matrix is selected. In the column, the channel that is the element of the row corresponding to the designated group number is selected.

A cordless telephone device according to a third aspect is the cordless telephone device according to the first aspect, wherein the first channel group is divided into n (n is an arbitrary positive integer) channel group, and The plurality of channels are arranged from the first row to the n-th row in the first to n-th n-th rows of the first channel group.
Are sequentially allocated to the respective channel groups, the (n + 1) th column is the second channel group, and the rows are associated with each other as a channel matrix having a designated group number and stored in the first storage means, and the master unit and / or the child unit The machine comprises second storage means for holding the designated group number, and the control means is stored in the second storage means in ascending order from the first column to the nth column of the channel matrix. If a channel that is an element of the row corresponding to the designated group number is requested and the determination means is requested to make a determination, and if it is determined that the designated channel is not used by the other device, the designation is performed. A channel is selected, and it is determined that any channel group corresponding to the first to nth columns of the channel matrix is used. Case is to select the channel which is an element of the row corresponding to the designated group number in the n + 1 column of the channel matrix.

The cordless telephone device according to a fourth aspect is the cordless telephone device according to the second or third aspect, wherein the master unit and / or the slave unit are designated group numbers held in the second storage means. Is provided with a designated group changing unit that changes the designated group based on a predetermined cyclic change sequence of the designated group, and the control unit changes the designated group according to
The selected channel is changed to a channel that is an element of a row corresponding to the changed designated group number in the column of the channel matrix that has selected the selected channel.

A cordless telephone device according to a fifth aspect is the cordless telephone device according to the second, third or fourth aspect, wherein the plurality of channels include a third channel group including the same elements as the second channel group. And the third channel group is arranged in the last column of the channel matrix, and the element of each row of the column is one of the designated group numbers corresponding to the row in the cyclic designated group changing order. In the column corresponding to the second channel group of the channel matrix, the control unit is the same as the element determined on the column to which the second channel group of the channel matrix is assigned by the previous designated group number. After selecting the channel that is the element of the row corresponding to the specified group number, call on the selected channel. When there is a disabled is for selecting a channel is an element of the row corresponding to the designated group number in the column corresponding to the third channel group of the channel matrix.

Further, a cordless telephone device according to a sixth aspect is the cordless telephone device according to the second, third, fourth or fifth aspect, wherein the cordless handset includes a talk key which is pressed by a user at the start of a call, After pressing the talk key, the control unit of the slave unit causes the determination unit to determine whether there is an empty channel in the first channel group based on the designated group number held in the second storage unit of the slave unit. The control unit of the parent machine makes a determination and sequentially transmits the empty channels in the first channel group, the channels corresponding to the designated group of the second channel group and / or the third channel group to the parent machine. One of the channels transmitted from the slave unit is used as a selected channel for a call between the master unit and the slave unit.

The cordless telephone device according to a seventh aspect is the cordless telephone device according to the second, third, fourth or fifth aspect, wherein the control means of the master unit has a second memory of the master unit when receiving a call. Based on the designated group number held by the means, the determination means is caused to determine the presence or absence of an empty channel in the first channel group, and the empty channel in the first channel group, the second channel group, and / or the second channel group. The channels corresponding to the designated group of the three channel groups are sequentially transmitted to the slave unit for a predetermined time, and when the response signal from the slave unit is received, the channel transmitted from the master unit is selected as the selected channel. It is used for a call between the master unit and the slave unit.

Further, the cordless telephone device according to claim 8 is the cordless telephone device according to any one of claims 1 to 4, wherein the control means of either the master unit or the slave unit is set to the first channel group. As a result of selecting the designated channel to which it belongs and communicating with either the master unit or the slave unit via the channel,
When a response signal is received from the other side within a predetermined time, it is determined that communication has been established, and the subsequent communication between the master unit and the slave unit is performed via the channel, and the response signal is transmitted from the other side for the predetermined time period. If not received within the second
A channel belonging to the channel group is selected and communication is performed with either the master unit or the slave unit.

The cordless telephone device according to claim 9 is the cordless telephone device according to claim 8, wherein the control means of either the master unit or the slave unit selects a channel belonging to the second channel group. If, as a result of the communication with either the master unit or the slave unit via the channel being performed as a result, a response signal is received from the other unit within the predetermined period of time, it is determined that communication has been established, and the subsequent master unit continues. And when the communication between the slave units is performed through the channel and the response signal is not received from the other within the predetermined time, the designated channel belonging to the first channel group is selected again, and the master unit or It is used to communicate with either one of the slaves.

A cordless telephone device according to a tenth aspect is the cordless telephone device according to the first aspect, wherein the plurality of channels are at least one channel belonging to the first channel group and the second channel group. A group designation that is held in the first storage means in association with a first to Mth group configured with one channel to which it belongs and that the master unit or the slave unit designates one of the first to Mth groups. Second means for storing means and group information for specifying the designated group
A storage unit, the control unit specifies a channel belonging to the first channel group forming a group corresponding to the group information stored in the second storage unit, and requests the determination unit to make a determination; When it is determined that the designated channel is not used by the other device,
The designated channel is selected, and otherwise, the channels belonging to the second channel group forming the group corresponding to the group information stored in the second storage means are selected.

A cordless telephone device according to an eleventh aspect is the cordless telephone device according to the tenth aspect.
The first to Mth groups each include channels belonging to two or more first channel groups, and the control means configures the first channel group that forms a group corresponding to the group information stored in the second storage means. If a channel that is determined not to be used by the other device exists in the designated channels by designating a channel that belongs to, and requests the determination to the determination means, determines that the channel is not used. One of the designated channels is selected, and if any of the designated channels is used by the other device, a group corresponding to the group information stored in the second storage means is formed. The channels belonging to the second channel group are selected.

A cordless telephone device according to a twelfth aspect of the present invention is the cordless telephone device according to the tenth or eleventh aspect, wherein the group designating means of either the parent device or the child device is the parent device or the child device. During communication to either of the other, the group information stored in the second storage means associated with the channel used for the communication is changed to the first to the first group other than the group corresponding to the group information. Any one of M group 1
One of the control means, one of the master unit and the slave unit, responds to the change request by the group designating means and uses it for the communication. Via the channel
This is for notifying either of the parent device or the child device that the information in the second storage means is changed to the other group information, and only when a response signal to the change is received from the other device, The information of the second storage means is changed to the other group information, and after the change is completed, the communication to either the master unit or the slave unit to the other is related to the other group information, the second channel. This is done through the channels belonging to the group.

A cordless telephone device according to a thirteenth aspect is the cordless telephone device according to the twelfth aspect.
The control means of either the master unit or the slave unit responds to the change request, and selects one of the first to Mth groups other than the group corresponding to the group information stored in the second storage unit. The selection of other group information that specifies one group is executed in a predetermined order.

A cordless telephone device according to a fourteenth aspect is the cordless telephone device according to the thirteenth aspect.
The second storage means stores the group information before the change even after the execution of the change.

A cordless telephone device according to a fifteenth aspect is the cordless telephone device according to any one of the tenth to fourteenth aspects, wherein a plurality of channels associated with each of the first to Mth groups are predetermined. Are assigned to the channels in the first channel group and the channels in the second channel group in each of the groups, and either of the master unit or the slave unit is assigned. The control means selects a higher-ranked channel of the priority order among the designated channels that are not used by the other devices belonging to the first channel group, and communicates with either the master unit or the slave unit on the channel concerned. As a result, the communication is confirmed when the response signal is received from the other side within a predetermined time. If the response signal is not received within the predetermined time from the other, the communication between the master unit and the slave unit is performed through the channel, and if the response signal is not received within the predetermined time, the other unit belongs to the first channel group. Channels are selected based on the priority order, excluding the channels used by the device, and communication with either the master unit or the slave unit is performed.

A cordless telephone device according to a sixteenth aspect is the cordless telephone device according to the fifteenth aspect.
The control means of either the master unit or the slave unit,
As a result of selecting the channel with the lowest priority and communicating with either the master unit or the slave unit via the channel, communication is established when a response signal is received from the other unit within the predetermined time. If the response signal is not received within the predetermined time from the other, the communication between the master unit and the slave unit is performed through the channel, and if the response signal is not received within the predetermined time, the higher order channel of the priority order is re-established. This is selected and communication is performed with either the master unit or the slave unit.

Further, a cordless telephone device according to a seventeenth aspect is the cordless telephone device according to any one of the first to sixteenth aspects, wherein the control means relates to all the group information stored in the second storage means. For the above channel, the determination means is requested to make a determination.

[0024]

In the cordless telephone apparatus according to the first aspect of the present invention, a plurality of channels permitted to be used for a call between the master unit and the slave unit are used only when the other units are not using the channels. The first channel group that is allowed to use the call of the cordless telephone device and the second channel group that can be used to the telephone call of the cordless telephone device regardless of the use of other devices are treated separately. And / or a plurality of channels belonging to the first channel group and a plurality of channels belonging to the second channel group are stored in the first storage means of the slave unit, and the control unit of the master unit and / or the slave unit stores the call prior to the call. Then, at least one of the plurality of channels belonging to the first channel group stored in the first storage means is designated to request the determination means to make a determination, and the designated channel is assigned to another device. When it is determined that the channel is not being used, the designated channel is selected, otherwise, one is selected from the plurality of channels belonging to the second channel group held in the first storage means. I am trying.

For example, in order to comply with the new FCC standard, what is conventionally used is the second channel group,
The newly usable one is assigned as the first channel group, and in the channel selection, first, the presence or absence of a free channel in the first channel group is checked, and if there is a free channel, the channel is selected, and the free channel is released. When there is no channel, it is sufficient to select from the second channel group, and it is possible to realize a cordless telephone device that can efficiently select a channel in accordance with the new FCC standard.

As a channel used for a call between the master unit and the slave unit, the channel selected by either the master unit or the slave unit may be used by both the master unit and the slave unit. Channels may be selected separately in the slave unit and the same or different transmission channels may be used in the master unit and the slave unit.

In the cordless telephone device according to the second aspect of the present invention, a plurality of channels are used in which the first column is the first channel group, the second column is the second channel group, and the row is the designated group number. It is held in the first storage means in association with the matrix, and the second of the master unit and / or the slave unit.
The storage unit holds the designated group number, and the master unit and / or the slave unit control unit stores the designated group number stored in the second storage unit in the first column of the channel matrix. When a channel that is an element is designated and the determination means is requested to make a determination, and it is determined that the specified channel is not used by another device,
Select the specified channel, otherwise,
In the second column of the matrix, the channel that is the element of the row corresponding to the designated group number is selected.

For example, if the designated group number stored in the second storage means is arbitrarily initialized when the power is turned on, and the group number including the channel used in the subsequent call is updated at any time. ， It becomes possible to select the channel in a more efficient procedure.

By limiting the channel selection candidates to one row in the channel matrix,
The scanning operation performed in channel selection can be performed efficiently in a shorter time, and the power consumption can be reduced in combination with the intermittent operation of the scanning operation.

Further, in the cordless telephone device according to the third aspect, the number of the first channel group is n (n is an arbitrary positive integer).
, The plurality of channels are sequentially allocated to the first to nth n-th channel groups of the first channel group, and the n + 1th column is the second channel group. The row is associated with a channel matrix having a designated group number and held in the first storage means, and the group number designated in the second storage means of the parent device and / or the child device is held, and the parent device and / or the child device. The control means specifies the channels which are the elements of the row corresponding to the specified group number held in the second storage means in ascending order from the first column to the n-th column of the channel matrix, and makes a determination by the determination means. , And if it is determined that the designated channel is not being used by another device, the designated channel is selected and the first of the channel matrix is selected.
If it is determined that all the channel groups corresponding to the columns from the nth column are used, the channel that is the element of the row corresponding to the designated group number in the n + 1th column of the channel matrix is selected. I am trying to do it.

For example, the first channel group that is newly usable under the new FCC standard is further divided into a plurality of channel groups, and the first channel group is selected with priority over the second channel group. It is possible to increase the selection opportunities, and the selection of the second channel group is made even if the channel is used, whereas the selection of the first channel group is not made unless the channel is empty. Since it is less likely that interference will be generated in the talking state when selected from the group, it is possible to suppress the occurrence of interference in the talking state. The elements of the first to n-th n-th channel groups of the first channel group can be duplicated, but the elements of each row (each group) in the channel matrix cannot be duplicated.

Further, by limiting the candidates for channel selection to one row in the channel matrix,
The scanning operation performed in channel selection can be performed efficiently in a shorter time, and the power consumption can be reduced in combination with the intermittent operation of the scanning operation.

Further, in the cordless telephone device according to the fourth aspect, the designated group number stored in the second storage means in the master unit and / or the slave unit is changed to the designated group changing unit in response to the pressing of the predetermined key. According to the change of the designated group, the control means changes the selected channel in the column of the channel matrix that has selected the selected channel. The channel that is the element of the row corresponding to the designated group number is changed.

As a result, when, for example, the interference of the harmonic used in the channel used for the call or the interference of the channel of the adjacent frequency occurs, the user changes the channel by pressing the predetermined key. Interfering events can be eliminated. In this case, the order of changing the cyclic designated groups is such that the channel frequencies before and after the specified group are separated as much as possible.

Further, in the cordless telephone device according to the fifth aspect, a plurality of channels includes a third channel group including the same elements as the second channel group, and the third channel group is set to the last column of the channel matrix. And the elements of each row of the column are assigned to the second channel group of the channel matrix by the designated group number immediately before the designated group number corresponding to the row in the cyclic designated group changing order. The control means selects the channel that is the element of the row corresponding to the designated group number in the column corresponding to the second channel group of the channel matrix, and If there is a problem with the call on the selected channel, enter the column corresponding to the third channel group in the channel matrix. There have been to select the channel which is an element of the row corresponding to the designated group number.

In the cordless telephone device according to the first, second, third or fourth aspect, when there is no free channel in the first channel group, the channel of the designated group number of the second channel group is selected. When the designated group numbers held by the respective second storage means are different from each other, or there is no response from the other called party even if a call is made from one of the selected channels, the call state is entered. It is also possible that it cannot be done.

If the channel is selected from the third channel group, in other words, if the channel of the designated group number immediately before in the changing order of the designated group is selected in the second channel group, the above-mentioned trouble occurs. It is possible to suppress the channel selection, to efficiently select the channel, and to more reliably make a transition to the call state.

Further, in the cordless telephone device according to the sixth aspect, when the talk key is pressed by the user at the start of the call in the cordless handset, the control means of the cordless handset causes the cordless telephone set
Based on the designated group number stored in the storage means, the determination means is caused to determine the presence or absence of an empty channel in the first channel group, and the empty channel, the second channel group and / or the third channel group in the first channel group are determined. The channels corresponding to the designated group are sequentially transmitted to the master unit, and the control unit of the master unit uses one of the channels transmitted from the slave units as a selected channel and uses it for a call between the master unit and the slave units. Is desirable.

Further, in the cordless telephone device according to the seventh aspect, the control means of the master unit, when the call is received, the second unit of the master unit.
Based on the designated group number stored in the storage means, the determination means is caused to determine the presence or absence of an empty channel in the first channel group, and the empty channel, the second channel group and / or the third channel group in the first channel group are determined. The channels corresponding to the designated group are sequentially transmitted to the slave unit for a predetermined time, and when the response signal from the slave unit is received, the channel transmitted from the master unit is used as the selected channel, and between the master unit and the slave unit. It is preferable to use it for telephone calls.

Further, in the cordless telephone device according to the eighth aspect, the control means of either the master unit or the slave unit selects the designated channel belonging to the first channel group, and communicates with either the master unit or the slave unit. If a response signal is received from the other within a predetermined time as a result of performing the communication via the relevant channel, it is determined that communication has been established, and subsequent communication between the master unit and the slave unit is performed via the channel. In addition, when the response signal is not received within the predetermined time, the channel belonging to the second channel group is selected.

Further, in the cordless telephone apparatus according to the ninth aspect, the control means of either the master unit or the slave unit selects a channel belonging to the second channel group,
If a response signal is received from the other device within the predetermined time as a result of performing communication with either the master device or the slave device via the channel, it is determined that communication has been established,
Subsequent communication between the master unit and the slave unit is performed via the channel, and if the response signal is not received within a predetermined time, the designated channel belonging to the first channel group is selected again.

Further, in the cordless telephone device according to the tenth aspect, the control means designates a channel belonging to the first channel group forming a group corresponding to the group information stored in the second storage means, and makes a determination by the determination means. Is requested and it is determined that the designated channel is not being used by another device, the designated channel is selected; otherwise, it corresponds to the group information stored in the second storage means. The channels belonging to the second channel group forming the group to be selected are selected.

Further, in the cordless telephone device according to the eleventh aspect, the control means designates the channels belonging to the first channel group forming the group corresponding to the group information stored in the second storage means, and makes the determination means. Request, and if there is a channel determined not to be used by another device among the designated channels, one of the channels determined not to be used is selected and the designated When any of the selected channels is used by another device, the channel belonging to the second channel group forming the group corresponding to the group information stored in the second storage means is selected. .

Further, in the cordless telephone device according to the twelfth aspect of the present invention, the control means of either the master unit or the slave unit responds to the change request by the group designating means and sends the change request via the channel used for the communication. , Notifying either of the master unit or the slave unit that the information in the second storage means is changed to other group information, and only when the response signal to the change is received from the other unit, the second The information in the storage means is changed to other group information, and after completion of the change, communication to either the master unit or the slave unit to the other is performed via the channel belonging to the second channel group associated with the other group information. I am trying to do it.

In the cordless telephone device according to the thirteenth aspect, the control means for either the master unit or the slave unit is:
In response to the change request, selection of other group information specifying one of the first to Mth groups other than the group corresponding to the group information stored in the second storage means is executed in a predetermined order. To do so.

Further, in the cordless telephone device according to the fourteenth aspect, it is desirable that the second storage means stores the group information before the change even after the change is executed.

In the cordless telephone system according to the fifteenth aspect, the control means for either the master unit or the slave unit is:
As a result of selecting a higher priority channel among the designated channels not used by other devices belonging to the first channel group and communicating with either the master unit or the slave unit through the channel, the response from the other side If a signal is received within a predetermined time, it is determined that communication has been established,
If the subsequent communication between the master unit and the slave unit is performed via the channel and the response signal is not received from the other side within the predetermined time, the channels belonging to the first channel group and used by other devices are excluded. , Channels are selected based on priority.

Further, in the cordless telephone device according to the sixteenth aspect, the control means for either the master unit or the slave unit is
As a result of selecting the channel with the lowest priority and communicating with either the master unit or the slave unit via the relevant channel, if a response signal is received from the other within the specified time, it is determined that the communication has been established. However, the communication between the parent device and the child device that follows is performed via the channel, and when the response signal is not received from the other within the predetermined time, the channel with the higher priority is selected again. Is.

Further, in the cordless telephone device according to the seventeenth aspect, it is preferable that the control means requests the determination means to make a determination regarding all channels associated with the group information stored in the second storage means. .

[0050]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the cordless telephone device of the present invention will be described in detail below with reference to the drawings.

[Configuration of Master Unit] FIG. 1 is a block diagram of the master unit in the cordless telephone device according to one embodiment of the present invention.
In FIG. 1, the base unit of the cordless telephone device of the present embodiment is an antenna 101, a receiving unit 102, a transmitting unit 103, a frequency synthesizer 104, a frequency detector (FM_D).
ET circuit) 105, squelch circuit (determination means in claims) 106, reception mute circuit (RX_MUTE circuit)
107, hybrid IC 108, line interface (TEL I / F) 109, modulation circuit (MOD circuit) 1
11, transmission mute circuit (TX_MUTE circuit) 112
And a CPU (control means in the claims) 121.

In FIG. 1, PLL-DATA is a CPU.
121 is the data of the phase locked loop circuit given to the frequency synthesizer 104, and SQ is the result of the squelch check of the received signal performed by the squelch circuit 106. Further, the parent device is connected to the line 110 via the line interface 109.

[Configuration of Handset] FIG. 2 is a configuration diagram of a handset in the cordless telephone device of this embodiment. In FIG. 2, the cordless telephone device of the present embodiment has a slave unit, which includes an antenna 201, a receiving unit 202, a transmitting unit 203, a frequency synthesizer 1204, a frequency detector (FM_DET circuit) 205, and a squelch circuit (determining means in the claims) 2
06, amplifier 207, speaker 208, modulation circuit (MO
D circuit) 211, microphone 212, CPU (control means in the claims) 221, keyboard 222, receiver power switch (RX SW) 223, electrolytic capacitor 224 (capacity: C1) and resistor 225 (resistance value: R1). It is equipped with.

In FIG. 2, PLL-DATA is a CPU
221 is control data given to the phase locked loop (PLL) circuit in the frequency synthesizer 204 from S221.
Is the result of the squelch check of the received signal performed by the squelch circuit 206. Further, RXBPWR is a control signal for the receiver power switch 223, and the receiver power switch 223 outputs RX-VCC on / off-controlled for the power supply of the receiving system such as the receiver 202.

Further, the electrolytic capacitor 224 and the resistor 22
Reference numeral 5 is a circuit for controlling the intermittent operation in the scan operation, which sets the stop control signal STPCNT to "H".
When the level is set to the level, the electrolytic capacitor 224 is charged, and when the stop control signal STPCNT is set to the open potential, the electrolytic capacitor 224 is discharged at the time constant (C1 × R1) to generate the signal WA.
When KE-UP is at "H: active" level, the sleep mode is reached until it becomes "L" level after a certain time based on the time constant.

[Channel Matrix] FIG. 3 shows a channel matrix showing a group of channels that can be selected by the cordless telephone apparatus of this embodiment in the connection between the master unit and the slave unit. This channel matrix is held in a storage means (first storage means in the claims) realized by a ROM (not shown) or the like.

The columns of the channel matrix are assigned to each channel group, and the rows are storage means (second
It corresponds to a designated group number held in a storage means (not shown, but realized by an SRAM or the like). In this embodiment, the contents of the storage means are initially set when the power is turned on and then updated for each call to the designated group number used in the call. Therefore, when the channel used for the call is selected, the designated group number including the channel used in the call immediately before the call is stored.

The first channel group is a new channel group that is newly available under the new FCC standard, and is a channel group that cannot be selected when used by a device other than the cordless telephone device. A group and a group B. The second channel group is a channel group assigned by the conventional FCC standard, is an old channel group that can be selected regardless of the use of other devices, and is a group C.

Further, the third channel group (D group) includes the same elements as the second channel group (C group),
This is added to the last column of the matrix, and this column (D group)
The element of each row is determined on the column to which the second channel group of the channel matrix is assigned by the designated group number immediately preceding the designated group number corresponding to the row in the cyclic designated group changing order. It is the same as the element.

Here, the cyclic designated group change order is applied when the user changes the channel during a call, and the channel change key provided on the keyboard 222 of the handset is pressed. A channel change instruction is given by.

The user usually changes the channel
In the channel used for the call, interference due to harmonics,
This is because there is interference by channels of adjacent frequencies, and the order of change is set so that these interference events are eliminated. That is, in the present embodiment, the changing order of the cyclic designated group is set as follows. 1 → 7 → 4 → 2 → 10 → 3 → 9 → 6 → 8 → 5 → 1

The third matrix (D group) is included in the channel matrix because the first channel group (A) is included in the channel selection method of the present embodiment as described later.
Group and group B), when there is no vacant channel, the channel with the designated group number of the second channel group (group C) is selected, but the designated group number is different between the master unit and the slave unit, or the channel It is assumed that there is no response from the callee side even if the call is made in step 2. In such a case, the channel is selected from the third channel group (group D). That is, from the old channel group, the channel of the previous designated group number in the designated group change order is selected.

The order of the columns (1st, 2nd, 3rd, 4th) of the channel matrix of FIG. 3 represents the priority order to which each channel group is applied in the channel selection. Group, C
The scanning is performed in order of the group and the group D. However, in reality, as will be described later, the scan operation in the slave unit and the master unit is performed on the channel groups A, B, and C, and the scan operation is not performed on the group D.

[Scan Operation of Child Device] Next, the scan operation of the child device will be described with reference to the timing chart shown in FIG.

First, the timing T1 (see FIG. 4 (f))
By an external interrupt such as pressing the talk key,
The signal WAKE-UP goes to "L" level (Fig. 4 (a)
Then, the oscillation of the clock that drives the CPU 221 is started (see FIG. 4B).

After the time tb as the time until the clock oscillation output of the clock oscillator stabilizes, that is, at the timing T2, the control signal RXBPWR is set to "L:" from the CPU 221 to turn on the power supply of the receiving system.
The active control signal is output at the "active" level, and the stop control signal STPCNT is output at the "H" level in order to charge the electrolytic capacitor 224 for the next intermittent operation.

Next, at the timing T3 after the time tc until the power supply voltage (Vcc) of the PLL_IC circuit stabilizes after the power supply to the receiving system is turned on, C
PLL-DATA is supplied from the PU 221 to the frequency synthesizer 204. Here, PLL-DATA is frequency data of the channel corresponding to the designated group number of the A group in the channel matrix.

After the output of PLL-DATA, a squelch check is performed by the squelch circuit 206 after a predetermined time has elapsed. Squelch signal SQ which is the result of squelch check
Is received by the CPU 221 and it is determined whether the channel is empty or in use.

Further, the output of PLL-DATA is similarly performed for the channels corresponding to the same designated group numbers of the B group and the C group in the channel matrix. As the time interval of the output of PLL-DATA, the stable time of the receiving operation in the receiving system and the squelch circuit 2
Times td, te, and tf taking into consideration the stabilization time of the squelch check operation in 06 are taken.

Next, the frequency data (PL
At the timing T5 when the time tf has passed since the output of (L-DATA), it is assumed that the scan operation is completed and C
The PU 221 sets the control signal RXBPWR to the “H” level and the stop control signal STPCNT to the open potential, then stops the clock oscillation and enters the stop mode.

The concrete time intervals in the timing chart of FIG. 4 are as follows. ta = 117 [msec]; tb + tc + td + te +
tf tb = 17 [msec]; clock oscillation stabilization time tc = 10 [msec]; Vcc stabilization time of PLL_IC td = 30 [msec]; reception stabilization time and squelch stabilization time te = 30 [msec]; reception stabilization time and squelch Stabilization time tf = 30 [msec]; reception stabilization time and squelch stabilization time

As described above, in the scan operation of the slave unit,
One channel selection candidate for one row in the channel matrix, that is, one from the channel groups A, B, and C
Since the operation is limited to each channel, the scan operation can be performed efficiently in a shorter time, and the power consumption can be reduced in combination with the intermittent operation of the scan operation.

[Scan Operation of Master Unit] Next, the scan operation of the master unit will be described with reference to the timing chart shown in FIG.

First, the timing T1 (see FIG. 5B).
Then, PLL-DATA is supplied from the CPU 121 to the frequency synthesizer 104. PLL-DATA
Is frequency data of the channel corresponding to the designated group number of the A group in the channel matrix.

After the output of PLL-DATA, a squelch check is performed by the squelch circuit 106 after a lapse of a predetermined time. Squelch signal SQ which is the result of squelch check
Is received by the CPU 121, and it is determined whether the channel is empty or in use.

Further, the output of PLL-DATA is similarly performed for the channels corresponding to the same designated group numbers of the B group and the C group in the channel matrix,
Repeated scanning operation is performed in the order of A group → B group → C group → A group. In addition, as the time interval of the output of PLL-DATA,
Times ta and tb are taken in consideration of the stable time of the receiving operation in the receiving system and the stable time of the squelch check operation in the squelch circuit 106.

The concrete time intervals in the timing chart of FIG. 5 are as follows. ta = 30 [msec]; reception stable time and squelch stable time tb = 30 [msec]; reception stable time and squelch stable time

As described above, in the scan operation of the master unit,
One channel selection candidate for one row in the channel matrix, that is, one from the channel groups A, B, and C
Since the operation is limited to each channel, the scan operation can be performed efficiently in a shorter time.

[Procedure of Connection Operation between Child Unit and Master Unit] Next, the procedure of the connection operation between the child unit and the parent unit will be described. First, the outline of the connection operation will be described. Note that the master unit is the calling side in the case of a call connection by answering a bell, an answer connection, etc., and the slave unit is the calling side in the case of a call connection by a talk key input, a remote connection, etc. .

When both the master unit and the slave unit are callers, the presence or absence of a vacant channel in each channel group (A group, B group and C group) is checked by the above-described scanning operation. From the calling side, code transmission is performed by using the empty channel confirmed by the scanning operation as a transmission channel, and when the ACK code is returned from the called side, the channel is continuously used to reach the call connection state.

If the ACK code is not returned from the called side, the transmission channel of the calling side is busy (BUS).
When it is judged that the status is Y), the code transmission is repeated by using another empty channel as a transmission channel.

FIG. 6 is a flow chart showing the processing in the slave unit and the master unit from the input of the talk key on the slave unit side to the call connection state. First, when there is a talk key input event E621 when the slave unit is in the standby state (step S601), the process proceeds to step S604 through the determination of step S602. Also, step S
In the determination of 602, the standby state is continued until an event such as a key input occurs.

Next, in step S604, the "scanning operation of the child device" described above is performed. That is, whether or not the corresponding channels of the first channel group (A group, B group) and the second channel group (C group) based on the designated group number held in the second storage means of the slave unit are available or not. The determination is made by the squelch circuit 206.

In step S605, the determined free channel of the first channel group (group A, group B), the second channel
Channel group (C group) and / or third channel group (D
A call request code is sequentially transmitted to the parent device using a channel corresponding to the designated group (group) as a transmission channel (event E622).

On the master unit side, if there is a transmission request code transmission event E622 when the master unit is in the standby state (step S611), the process proceeds to step S614 through the judgment of step S612. Also, step S
In the judgment of 612, the standby state is continued until an event such as code reception occurs.

In step S614, a transmission request ACK code indicating that the transmission request code transmission event E622 from the slave is accepted is transmitted to the slave (event E623). Note that if the transmission event E622 of the transmission request code from the slave does not reach the master due to a problem in radio wave propagation, or if there is a bell incoming immediately before the transmission event E622 is received, the transmission request AC
The K code transmission event E623 does not occur.

If the transmission event E623 of the transmission request ACK code from the master unit is accepted on the slave unit side, step S
At 606, the execution code is transmitted to the parent device (event E624). Send event E of the execution code
When the parent machine receives 624, step S61
The line is connected in step 5, and the call connection state in step S607 is reached.

Next, FIG. 7 is a flow chart showing the procedure for changing the channel when in the call connection state.
In addition, here, the channel change during a call will be described below, but the channel change is not only during a call but also during a remote connection (controlling the answering machine function of the base unit from the handset) or a call screen (automatic response when an incoming call is received) It can be done even during connection.

First, a call connection state (step S607)
If the channel change key provided on the keyboard 222 of the child device is input while
1) In step S701, the group number corresponding to the currently selected channel is changed based on the change order of the cyclic designated group described above, and the channel number corresponding to the changed group number of the second channel group is changed. To change to, the channel change request code is transmitted to the parent device (event E722).

On the master side, when the transmission event E722 of the channel change request code is accepted, step S71 is performed.
In 1, the channel change request ACK code is transmitted to the child device (event E723).

Next, upon receiving the transmission event E723 of the channel change request ACK code from the master unit, the slave unit transmits the execution code to the master unit in step S702 (event E724). When the parent device receives the transmission event E724 of the execution code,
The connection channel is changed in step S712, and the connection channel is also changed in step S703 on the handset side, and the call connection state of step S704 is restored.

Next, FIG. 8 is a flow chart showing a procedure for disconnecting the line when in a call connection state. First, when there is a talk key input event E821 when the slave unit and the master unit are in the call connection state (step S704), a disconnection request code is transmitted to the master unit in step S801 (event E822).

Upon receiving the disconnection request code transmission event E822, the parent machine disconnects the round in step S811, and in step S812 the disconnection code is transmitted to the child machine (event E823), and the parent machine waits. It returns to a state (step S813). Also on the slave side, the disconnection code transmission event E from the master side
When 823 is received, the standby state (step S80
Return to 2).

Next, FIG. 9 is a flow chart showing the processing in the slave unit and the master unit from the arrival of a bell call on the master unit side until the call connection state is reached. First, when there is a bell incoming event E921 while the master unit is in the standby state (step S911), the process proceeds to step S913 through the determination of step S912. Further, in the determination of step S912, the standby state is continued until an event such as a ringing of the bell occurs.

Next, in step S913, the "scan operation of the master unit" described above is performed. That is, it is determined whether or not the corresponding channels of the first channel group (A group, B group) and the second channel group (C group) based on the designated group number held in the second storage means of the parent device. The determination is made by the squelch circuit 106.

In step S914, the determined first channel group (A group, B group) and second channel group (C
Group) or a channel corresponding to the designated group of the third channel group is used as a transmission channel, the incoming call request code is sequentially transmitted to the child device (event E922).

On the slave unit side, if there is a transmission event E922 of the incoming request code while the slave unit is in the standby state (step S901), the process proceeds to step S904 through the judgment of step S902. Also, step S
In the determination of 902, the standby state is continued until an event such as code reception occurs.

In step S904, an incoming call request ACK code indicating that the transmission event E922 of the incoming call request code from the parent machine is accepted is transmitted to the parent machine (event E923). If the transmission request code transmission event E922 from the base unit does not reach the base unit due to a problem in radio wave propagation, the reception request ACK code transmission event E923 does not occur.

When the parent machine receives the transmission event E923 of the incoming request ACK code from the child machine, step S923 is performed.
At 915, the incoming call code is transmitted to the child device (event E924). After that, in step S916,
A judgment is made as to whether or not the incoming call has arrived. If it is not completed in step S916, the process returns to step S914 to transmit the incoming call request code again, and if it is completed, the system returns to the standby state (step S917).

On the other hand, on the side of the slave unit, when the transmission event E924 of the incoming code from the master unit is accepted, step S9 is executed.
At 05, the ring tone is emitted from the bell speaker of the handset.
The user presses the talk key by being prompted by the ring tone of the child device (event E925).

Next, in step S906, it is determined whether or not there is a key input, and a talk key input event E925
If there is, the process proceeds to step S605 in FIG. If there is no key input, the process advances to step S907 to determine a timeout of the incoming call state. If the time-out has not been reached, the process returns to the determination in step S902, and if the time-out has occurred, the process returns to the standby state.

[Details of Channel Selection when Handset is Calling Side] The outline of the processing flow from the input of the talk key on the handset to the call connection state has been described with reference to FIG. However, here, the detailed operation of channel selection in the call connection procedure when the slave is the calling side will be described with reference to the timing charts of FIGS. 10 to 13.

First, when an event of talk key input occurs (see FIG. 10A), the control signal RXBPW is set in the slave unit.
R becomes "L: active" level, the power supply voltage supply of the receiving system is turned on (see FIG. 10B), and the empty channel by the squelch check of the squelch circuit 206 at timing T1 (see FIG. 10F). Perform a scan for detection. The scan is based on the designated group number held in the second storage means, and the first channel group (A
Group, group B), and the corresponding channels of the second channel group (group C).

In FIG. 10, it is assumed that, as a result of the scan of empty channels, all of the groups A, B, and C become "vacant channels". In this case, in principle, the calling request code transmitted from the child device to the parent device is A
The channels corresponding to the vacant channels of the group and the group B and the designated groups of the group C and the group D are sequentially used as the transmission channels and transmitted.

Therefore, from timing T2, it is sufficient to circulate the transmission channels in the order of priority order of A group → B group → C group → D group and transmit the transmission request code. As will be described with reference to Fig. 5, the combination of channel groups used for transmission differs depending on the result of the empty channel scan, and in the method of simply circulating and transmitting, the processing flow is prepared separately for each case of the scan result. It is necessary to do so, the number of programs increases, and it becomes complicated.

The transmission of the outgoing call request code is repeated until the outgoing call request ACK code is sent from the parent machine, but during that time, an event such as a bell arrival occurs on the parent machine side, and the parent machine side Therefore, there is a possibility that “simultaneous transmission” in which the slave unit transmits on the same channel as the transmission channel used for transmitting the transmission request code occurs, and it is necessary to handle this simultaneous transmission.

In order to deal with the various problems as described above, the present embodiment employs the following transmission request code transmission method.

That is, the first for detecting an empty channel
After scanning, the first transmission channel and the second transmission channel are sequentially transmitted from timing T2, and timing T3
The second scan for coping with simultaneous transmission is performed, and after the second scan, the third transmission channel and the fourth transmission channel are sequentially transmitted from timing T4, and the third scan for coping with simultaneous transmission is further performed. After 3 scans, the signals are sequentially transmitted on the fifth transmission channel and the sixth transmission channel. This series of processing is repeated (specifically, about 12 [sec]
Pause).

Here, the first, third, and fifth transmission channels, when there is an empty channel in the first channel group (A group, B group), an empty channel group having a higher priority than that (see FIG. 10). If there is no empty channel in the first channel group, then the second channel group (C
Group), or if there is no vacant channel in the first and second channel groups, it becomes the third channel group (D group).

The second transmission channel is the first channel group (A group, B group) when there is an empty channel,
Among them, the second channel group becomes the second highest priority channel group (group B in FIG. 10) or the second channel group (C if there is only one free channel in the first channel group).
Group) or if there is no empty channel in the first channel group, it becomes the third channel group (D group).

Also, the fourth transmission channel is the first channel group (group A, group B) when there is an empty channel,
Among them, the empty channel group having the third highest priority (not applicable in the present embodiment) or the second channel group (this C in FIG. 10 if there are two empty channels in the first channel group). Group) or if there is only one free channel in the first channel group, it becomes the third channel group (D group).

Further, the sixth transmission channel is the first channel group (A group, B group) when there is an empty channel,
If there is an empty channel group with the third highest priority (not applicable in this embodiment), or if there are two empty channels in the first channel group or there are no empty channels in the first channel group. Then, it becomes the third channel group (this group D in FIG. 10).

Since this method is premised on the case where the first, second and third scans are performed, when the first channel group is divided into four or more groups, the second channel group is the transmission channel. It is necessary to keep in mind that this is not an effective method because there is no case where

Further, in the second scan or the third scan for coping with simultaneous transmission, the squelch check is performed by the squelch circuit 206 for the A group, B group and C group, and if there is a channel being used, After a certain period of time, the code (ID code) transmitted on the channel frequency is deciphered and it is judged whether or not the code transmission is for itself. In other words, when there is a transmission from the base unit for myself, it means that simultaneous transmission has occurred, and the call connection from the handset is interrupted to respond to incoming requests from the base unit. Will be done.

Therefore, in this embodiment, in the second scan or the third scan for coping with simultaneous transmission, the A group,
The squelch check by the squelch circuit 206 is performed on the B group and the C group, and even if the result of the first scan is inconsistent, it is not reflected in the channel selection such as changing the transmission channel after that, but the channel selection is not performed. It is also possible to reflect in.

Further, in the case of FIG. 10, the sixth transmission channel becomes the third channel group (D group). By thus making the third channel group (D group) a transmission channel candidate, the parent channel To deal effectively with situations in which the designated group number differs between the mobile device and the slave device, or there is no response from the called side even if a call is made on a transmission channel that is confirmed to be empty. Becomes

Further, FIG. 11 assumes that the A group becomes the “used channel” and the B group and the C group become the “vacant channel” as a result of the empty channel scan similar to FIG. Third and fifth transmission channels are group B, second
The sixth transmission channel is group C and the fourth transmission channel is group D.

Further, FIG. 12 assumes that the results of the same empty channel scan as in FIG. 10 are that "A" and "C" are "empty channels" and "B" is "used channels". The third and fifth transmission channels are group A, the second and sixth transmission channels are group C, and the fourth transmission channel is group D.

Further, FIG. 13 assumes the case where the A and B groups become “used channels” and the C group becomes “vacant channels” as a result of the same empty channel scan as in FIG. The third and fifth transmission channels are group C, and the second, fourth, and sixth transmission channels are group D.

[Details of Channel Selection when Master Unit is Calling Side] Further, with reference to FIG. 9, an outline of a processing flow from the arrival of a bell call to the call connected state on the master unit side will be described. However, here, the detailed operation of channel selection in the call connection procedure when the parent device is the calling side will be described with reference to the timing charts of FIGS. 14 and 15.

First, when a bell incoming event occurs (see FIG. 14 (a)), the master unit receives timing T1 (see FIG. 14).
In (f)), a scan for vacant channel detection by the squelch check of the squelch circuit 106 is performed.
The scan is performed on the corresponding channels of the first channel group (A group, B group) and the second channel group (C group) based on the designated group number held in the second storage means.

In FIG. 14, it is assumed that, as a result of the empty channel scan, all of the A group, B group and C group become "empty channels". In this case, the incoming call request code transmitted by the master unit to the master unit should be transmitted by sequentially using the empty channels of the A and B groups and the channels corresponding to the designated group of the C group as the transmission channels. Becomes

That is, at timing T2, the incoming request code BELON1 is continuously transmitted to the slave unit by using the channel of the group A having a high priority among the empty channels detected by the scan as the transmission channel (FIG. 14). (See (d)). Incoming request code BE on the slave side
When LON1 is received (at timing T3)
Incoming request AC with the same channel as the transmission channel
The K code BELACK is transmitted to the base unit (FIG. 14).
(E)).

Next, the base unit side receives the incoming request ACK code BE.
When the ACK is received, the current transmission channel is fixed as the connection channel, and the incoming code BELON2 is continuously transmitted to the slave at timing T4.

Further, on the side of the handset, a predetermined time (300 [msec]) has passed after the transmission of the incoming request ACK code BELACK.
When the incoming code BELON2 is received within that time, the current transmission channel is fixed as the connection channel and the bell mode is entered (that is, the transmission system TXB is turned on to secure the channel).

Incoming request ACK code BELACK
If the incoming code BELON2 cannot be received within a fixed time (300 [msec]) after sending, the scanning operation is repeated and the bell mode is entered at the time when the incoming code BELON2 is received. The cordless handset is BE
Even if LON2 is received, the incoming ACK code is not transmitted to the master unit.

Next, in FIG. 15, the incoming call request code BELON1 is continuously sent from the parent machine to the child machine for a fixed time (for 6 [sec]) using the channel of group A having a high priority as a transmission channel. However, incoming call request A from the handset
When the CK code BELACK is not received (timing T6), the incoming request code is transmitted with the channel of the group B having the next highest priority as the transmission channel.

In addition, when the incoming request ACK code BELACK is not received for a certain time even when the incoming request code is transmitted by the channel of the group B, the incoming request is made with the channel of the group C having the next highest priority as the transmission channel. The code is transmitted (timing T7). In this case, the transmission channel by the group C is fixed as the connection channel, and the subsequent channel change is not performed.

The slave unit of this embodiment performs the scanning operation by the intermittent reception, and if the fixed time is 6 [sec], the scanning operation is performed three times.

[Others, Channel Frequency, Initial Settings, etc.] Next, FIG. 16 shows the correspondence between the channel numbers handled in this embodiment and the channel numbers of the FCC standard, and the slave unit and the master unit on each channel. The transmission frequency (center frequency of the band) is shown.

As described with reference to FIG. 3, the channels # 11 to # 25 of the first channel group are
New channel group that can be newly used in the new FCC standard (channel # 1 to channel # 1 in the FCC standard)
In 5), this is a channel group that cannot be selected when used by a device other than the cordless telephone device.

Channel # 1 of the second channel group
To channel # 10 is a group of channels assigned by the conventional FCC standard (channel # 10 by the FCC standard).
16 to channel # 25), which is an old channel group that can be selected regardless of the use of other devices.

As shown in FIG. 16, the transmission frequency when transmitting from the slave unit to the master unit and the transmission frequency when transmitting from the master unit to the slave unit are set for each channel. In this embodiment also, a frequency conforming to this is used.

Next, the initial setting of the designated group number immediately after the power is turned on will be described. As described above, the second storage means (SRAM or the like) for holding the designated group number
Is provided in each of the master unit and the slave unit, and the content thereof is set as follows when the slave unit is installed in the master unit and the battery is charged.

In other words, the slave unit in the uncharged state (the state in which nothing is set in the second storage means) is mounted on the charge terminal of the master unit, and about 1 [sec] after the charge is turned on,
Of the second channel group, the channel group (# 1, #
4, # 8, # 9, # 10) are randomly set, and the set channel data is transferred to the slave unit via the charge terminal.

When the charge is turned on during the call connection, the connection channel data in the call is transferred. A designated group number is set based on the transferred channel data.

In normal times, about 1 from charge-on.
After [sec], with respect to the designated group number currently held in the second storage means, each channel group is scanned to detect an empty channel, and the channel data of the empty channel having a high priority is transferred to the child terminal via the charge terminal. Transfer to the machine.

When the call is being connected, the connection channel data in the call is transferred. A designated group number is set based on the transferred channel data.

[0139]

As described above, claim 1 of the present invention
According to the cordless telephone device of the present invention, a plurality of channels permitted to be used for a call between the master unit and the slave unit are used for the call of the cordless telephone device only when not being used by another device. The first channel group which is allowed to make calls and the second channel group which can be used for the call of the cordless telephone device regardless of the use of other devices are treated separately. The storage means stores a plurality of channels belonging to the first channel group and a plurality of channels belonging to the second channel group,
In the control means of the master unit and / or the slave unit, prior to the call,
At least one of the plurality of channels belonging to the first channel group stored in the first storage means is designated to request the determination means to make a determination, and it is determined that the designated channel is not used by another device. If so, the designated channel is selected, otherwise, one is selected from a plurality of channels belonging to the second channel group held in the first storage means. When adapting to the new FCC standard, the conventionally used channel is assigned to the second channel group, and the newly usable channel is assigned to the first channel group. Check the presence or absence, and if there is a free channel, select the channel. If there is no free channel, check the second channel. It suffices to selecting from tunnel group, it is possible to provide a cordless telephone apparatus which can efficiently channel selection compliant with the new FCC standards.

Further, according to the cordless telephone device of the second aspect, the plurality of channels have the first column as the first channel group, the second column as the second channel group, and the rows as designated group numbers. It is held in the first storage means in association with the channel matrix, the designated group number is held in the second storage means of the master unit and / or the slave unit, and the channel number is held in the control unit of the master unit and / or the slave unit. In the first column of the matrix, the channel that is the element of the row corresponding to the designated group number held in the second storage means is designated and the determination means is requested to make a determination, and the designated channel is being used by another device. If it is determined that there is not, the designated channel is selected, otherwise, in the second column of the channel matrix, the element of the row corresponding to the designated group number is selected. Since it was decided to select a channel that, for example, as the group number specified is held in the second storage means, optionally initialized at power-on,
If the number of the group including the channel used in the subsequent call is updated at any time, it is possible to provide a cordless telephone device capable of selecting a channel in a more efficient procedure.

Further, by limiting the channel selection candidates to one row in the channel matrix,
It is possible to provide a cordless telephone device that can efficiently perform a scanning operation performed in channel selection in a shorter time and can reduce power consumption in combination with an intermittent operation of the scanning operation.

Further, according to the cordless telephone device of the third aspect, the first channel group is divided into n (n is an arbitrary positive integer) channel group, and the plurality of channels are divided from the first column to the first column. The nth column is the first to nth nth channels in the first channel group.
The channels are sequentially assigned to the respective channel groups, the (n + 1) th column is used as the second channel group, and the rows are associated and stored in the first storage means as a channel matrix having the designated group number. The group numbers designated in the storage means are held, and the control means of the master unit and / or the slave units are designated groups held in the second storage means in ascending order from the first column to the nth column of the channel matrix. The channel that is the element of the line corresponding to the number is designated, and the determination unit is requested to make a determination. When it is determined that the designated channel is not used by another device, the designated channel is selected and the channel is selected. If it is determined that any of the channel groups corresponding to the 1st to nth columns of the matrix are used, the channel matrix Since the channel that is the element of the row corresponding to the designated group number in the n + 1 column is selected, for example, the first channel group newly usable by the new FCC standard is further divided into a plurality of channel groups. Thus, by giving priority to the selection of the second channel group, it is possible to increase the chances of selecting the first channel group and suppress the occurrence of interference in the call state.
In addition, by limiting the channel selection candidates to one row in the channel matrix, the scanning operation performed in channel selection can be performed efficiently in a shorter time, and this can be combined with the intermittent scanning operation. Thus, a cordless telephone device that can reduce power consumption can be provided.

Further, according to the cordless telephone apparatus of the fourth aspect, the designated group number held in the second storage means in the master unit and / or the slave unit is designated in response to the depression of a predetermined key. The changing means changes the selected channel based on a predetermined cyclic change order of the specified group, and the control means changes the selected group to the column of the channel matrix that selects the selected channel. Since it was decided to change to the channel that is the element of the line corresponding to the specified group number changed in, for example, when there is interference due to harmonics in the channel used for communication or interference from channels of adjacent frequencies In addition, when the user presses a predetermined key to change the channel, these interference events can be eliminated. It is possible to provide a less telephone apparatus.

Further, according to the cordless telephone device of the fifth aspect, a plurality of channels include a third channel group including the same elements as the second channel group, and the third channel group is formed into a channel matrix. Organized in the last column,
In addition, the element of each row of the column is assigned to the second channel group of the channel matrix by the designated group number after the designated group number corresponding to the row in the cyclic designated group changing order. The control means selects the channel that is the element of the row corresponding to the designated group number in the column corresponding to the second channel group of the channel matrix, and then makes the call by the selected channel. If there is a problem with the above, it is decided to select the channel that is the element of the row corresponding to the designated group number in the column corresponding to the third channel group of the channel matrix, so that The designated group numbers held by the second storage means are different, or the designated channel numbers are different from each other. It is possible to suppress the occurrence of troubles such as not being able to shift to the call state when there is no response from the other called side even if the call is made from the other side, and it is possible to efficiently select the channel and to shift to the call state more reliably. A cordless telephone device capable of being provided can be provided.

According to the cordless telephone device of the sixth aspect, when the talk key is pressed by the user at the start of the call in the handset, the control means of the handset is held in the second storage means of the handset. Based on the designated group number, the determining means determines whether or not there is a vacant channel in the first channel group, and the vacant channel in the first channel group, the second channel group, and / or the third channel group is designated as the designated group. Since the corresponding channels are sequentially transmitted to the base unit, and the control means of the base unit decides to use one of the channels transmitted from the handset as a selected channel for the call between the base unit and the handset, It is possible to provide a cordless telephone device that can efficiently select a channel according to the new FCC standard.

Further, according to the cordless telephone device of the seventh aspect, the control means of the master unit, when receiving the call, based on the designated group number held in the second storage means of the master unit, the first channel. The determination means determines the presence / absence of an empty channel in the group, and transmits the empty channels in the first channel group, the channels corresponding to the designated group of the second channel group and / or the third channel group to the slave unit sequentially for a predetermined time. However, when the response signal from the slave unit is received, the channel transmitted from the master unit is used as the selected channel for the call between the master unit and the slave unit. It is possible to provide a cordless telephone device that can well select a channel.

According to the cordless telephone device of the eighth aspect, the control means of either the master unit or the slave unit selects the designated channel belonging to the first channel group, and either the master unit or the slave unit is selected. When the response signal is received from the other side within a predetermined time as a result of performing the communication for the communication via the channel, it is determined that the communication has been established, and the communication between the master unit and the slave unit is continued through the channel. If a response signal is not received within a predetermined time, the channel belonging to the second channel group with less restrictions is selected, so that the reliable master device and the slave device can comply with the new FCC standard. It is possible to provide a cordless telephone device capable of establishing communication with the cordless telephone device.

Further, according to the cordless telephone device of the ninth aspect, the control means of either the master unit or the slave unit selects the channel belonging to the second channel group to select either the master unit or the slave unit for the other. If a response signal is received from the other side within a predetermined time as a result of performing communication through the channel, it is determined that communication has been established, and subsequent communication between the master unit and the slave unit is performed through the channel. If the response signal is not received within a predetermined time, the designated channel belonging to the first channel group is selected again. Therefore, a cordless telephone device that can establish communication efficiently according to the new FCC standard is provided. Can be provided.

According to the cordless telephone apparatus of the tenth aspect, the control means designates the channels belonging to the first channel group forming the group corresponding to the group information stored in the second storage means, and makes the determination means. Requesting the determination, and if it is determined that the designated channel is not used by another device, the designated channel is selected; otherwise, the group information stored in the second storage means. Since the channels belonging to the second channel group forming the group corresponding to are selected,
While complying with the new FCC standard, without judging the use / non-use of all the channels belonging to the first channel group,
It is possible to provide a cordless telephone device that can perform channel selection.

Further, according to the cordless telephone apparatus of the eleventh aspect, the control means designates the channels belonging to the first channel group forming the group corresponding to the group information stored in the second storage means, and makes the determination means. Requesting a judgment to the selected channel, and if there is a channel judged not to be used by another device among the specified channels, one of the channels judged not to be used is selected, When any of the designated channels is used by another device, the channel belonging to the second channel group forming the group corresponding to the group information stored in the second storage means is selected. Therefore, it is possible to provide a cordless telephone device that can efficiently select a channel in accordance with the new FCC standard.

According to the cordless telephone apparatus of the twelfth aspect, the control means of either the master unit or the slave unit responds to the change request by the group designating means,
This is for notifying either the master unit or the slave unit that the information in the second storage means is to be changed to other group information via the channel used for the communication, and the other one notifies the change. Only when the response signal is received, the information in the second storage means is changed to other group information, and after the change is completed, the communication to either the master unit or the slave unit is related to the other group information. Since it is performed through the channel belonging to the second channel group, it is possible to provide a cordless telephone device capable of efficiently changing the channel according to the new FCC standard.

According to the cordless telephone device of the thirteenth aspect, the control means of either the master unit or the slave unit responds to the change request and responds to the group information stored in the second storage unit. Since the selection of other group information that specifies one of the first to Mth groups other than the group to be performed is executed in a predetermined order, it is possible to effectively change the channel according to the new FCC standard. A cordless telephone device can be provided.

Further, according to the cordless telephone device of the fourteenth aspect, the second storage means stores the group information before the change even after the change is executed, so that the channel is changed in either the master unit or the slave unit. It is possible to provide a cordless telephone device capable of establishing communication even if the above cannot be executed.

According to the cordless telephone apparatus of the fifteenth aspect, the control means of either the master unit or the slave unit has the priority in the designated channel which is not used by another device belonging to the first channel group. As a result of selecting the upper channel and communicating with either the master unit or the slave unit via the relevant channel as a result, if a response signal is received from the other unit within a predetermined time, it is determined that the communication has been established and the subsequent parent unit continues. When the communication between the device and the child device is performed through the channel and the response signal is not received from the other device within the predetermined time, priority is given to the channels except the channels belonging to the first channel group and used by other devices. Since the channels are selected based on the order, it is possible to provide a cordless telephone device that can establish communication efficiently in compliance with the new FCC standard. .

According to the cordless telephone device of the sixteenth aspect, the control means of either the master unit or the slave unit selects the channel with the lowest priority and communicates with either the master unit or the slave unit. As a result of performing via the channel, if a response signal is received from the other within a predetermined time, it is determined that communication has been established, and subsequent communication between the master unit and the slave unit is performed via the channel. On the other hand, when the response signal is not received within the predetermined time, the higher priority channel is selected again, so that a cordless telephone device capable of efficiently establishing communication in accordance with the new FCC standard is provided. You can

Further, according to the cordless telephone device of the seventeenth aspect, the control means, regarding all channels related to the group information stored in the second storage means,
Since the judgment is requested to the judgment means, it is possible to provide the cordless telephone device which can efficiently select all the channels related to the group information.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a master unit in a cordless telephone device according to an embodiment of the present invention.

FIG. 2 is a configuration diagram of a child device in the cordless telephone device of the present embodiment.

FIG. 3 is an explanatory diagram of a channel matrix showing a group of channels that can be selected by the cordless telephone device of the present embodiment in the connection between the master unit and the slave unit.

FIG. 4 is a timing chart illustrating a scan operation of a child device.

FIG. 5 is a timing chart illustrating a scan operation of the master unit.

FIG. 6 is a flowchart showing processing in the slave unit and the master unit from the talk key input on the slave unit side to the call connection state.

FIG. 7 is a flowchart showing a procedure for changing a channel when in a call connection state.

FIG. 8 is a flowchart showing a procedure for disconnecting a line when in a call connection state.

FIG. 9 is a flowchart showing the processing in the slave unit and the master unit from the arrival of a bell call at the master unit to the call connection state.

FIG. 10 is a timing chart (No. 1) explaining the detailed operation of channel selection in the call connection procedure when the slave is the calling side.

FIG. 11 is a timing chart (No. 2) explaining the detailed operation of channel selection in the call connection procedure when the slave is the calling side.

FIG. 12 is a timing chart (No. 3) explaining the detailed operation of channel selection in the call connection procedure when the slave is the calling side.

FIG. 13 is a timing chart (No. 4) explaining the detailed operation of channel selection in the call connection procedure when the slave is the calling side.

FIG. 14 is a timing chart (No. 1) explaining the detailed operation of channel selection in the call connection procedure when the parent device is the calling side.

FIG. 15 is a timing chart (No. 2) explaining the detailed operation of channel selection in the call connection procedure when the parent device is the calling side.

FIG. 16 is an explanatory diagram of the correspondence between the channel numbers handled in the embodiment and the channel numbers of the FCC standard, and the transmission frequencies of the child device and the parent device in each channel.

[Explanation of symbols]

101, 201 antenna 102, 202 receiving unit 103, 203 transmitting unit 104, 204 frequency synthesizer 105, 205 frequency detector (FM_DET circuit) 106, 206 squelch circuit (determining means) 107 reception mute circuit (RX_MUTE circuit) 108 hybrid IC 109 line Interface (TEL I / F) 110 Line 111, 211 Modulation circuit (MOD circuit) 112 Transmission mute circuit (TX_MUTE circuit) 121, 221 CPU (control means) PLL-DATA Phase-locked loop circuit data SQ Squelch check result 207 Amplifier 208 Speaker 212 Microphone 222 Keyboard 223 Receiver power switch (RX SW) 224 Electrolytic capacitor (capacity: C1) 225 Resistance (resistance value: R1) RXBPW R Control signal for receiver power switch 223 STPCNT Stop control signal WAKE-UP Wake-up signal

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Fumiya Hirayama 4-7-4 Onidaka, Ichikawa City, Chiba Uniden Corporation

Claims (17)

[Claims] 1. A single channel is selected from a plurality of channels that have a master unit and a slave unit and are allowed to be used for communication between the master unit and the slave unit, and the selected channel is selected. In a cordless telephone device that communicates using a channel, the plurality of channels is a first channel group that is allowed to be used for communication of the cordless telephone device only when it is not used by another device. ，
A second channel group that can be used to communicate with the cordless telephone device regardless of its use by the other device;
The master unit and / or the slave unit stores a plurality of channels belonging to the first channel group and a plurality of channels belonging to the second channel group;
Determination means for determining whether or not the designated channel is used by the other device, and a plurality of channels belonging to the first channel group held in the first storage means prior to the communication. At least 1 out of
Requesting the determination means to determine the specified channel, and if it is determined that the specified channel is not being used by the other device, the specified channel is selected; otherwise, the first storage A cordless telephone device, comprising: a control means for selecting one of a plurality of channels belonging to the second channel group held by the means. 2. The plurality of channels are associated with each other as a channel matrix having a first column as the first channel group, a second column as the second channel group, and a row as a designated group number. The master unit and / or the slave unit has a second storage unit that holds the designated group number, and the control unit holds the second column in the first column of the channel matrix. When a channel that is an element of a row corresponding to the designated group number stored in the storage means is designated and the determination means is requested to make a determination, and it is determined that the designated channel is not used by the other device. Is the element of the row corresponding to the specified group number in the second column of the channel matrix. 2. The cordless telephone device according to claim 1, wherein the cordless telephone device is selected. 3. The first channel group is divided into n (n is an arbitrary positive integer) channel group, and the plurality of channels are arranged from the first column to the n-th column of the first channel group. Sequentially assign to 1 to n-th n channel groups,
The n + 1th column is used as the second channel group, and the row is held in the first storage means in association with a channel matrix having a designated group number, and the master unit and / or the slave unit are assigned to the designated group. The control means has a second storage means for holding the numbers, and the control means corresponds to the designated group number held in the second storage means in ascending order from the first column to the nth column of the channel matrix. When a channel that is an element of a row is designated and the determination unit is requested to make a determination, and it is determined that the designated channel is not used by the other device, the designated channel is selected and the channel If it is determined that any of the channel groups corresponding to the 1st to nth columns of the matrix are used, the channel matrix is used. Scan cordless telephone apparatus according to claim 1, wherein the selecting channel is an element of the row corresponding to the designated group number in the n + 1 column. 4. The master unit and / or the slave unit determines a designated group number held in the second storage unit based on a predetermined cyclic change order of the designated group by pressing a predetermined key. The control means has a designated group changing means for changing the designated group, and the changed designated group number in the column of the channel matrix that has selected the selected channel in association with the designated group change. 4. The cordless telephone device according to claim 2, wherein the channel is changed to a channel which is an element of the row corresponding to. 5. The plurality of channels includes a third channel group including the same elements as the second channel group,
The third channel group is formed in the last column of the channel matrix, and the elements in each row of the column are designated immediately before the designated group number corresponding to the row in the cyclic designated group changing order. The control unit is the same as the element determined on the column to which the second channel group of the channel matrix is assigned according to the group number, and the control means controls the designated group in the column corresponding to the second channel group of the channel matrix. After selecting a channel that is an element of the row corresponding to the number, if communication by the selected channel is disturbed, the row corresponding to the designated group number in the column corresponding to the third channel group of the channel matrix. The code according to claim 2, 3 or 4, wherein a channel that is an element of is selected. Scan telephone device. 6. The slave unit has a talk key that is pressed by a user when communication is started, and the control unit of the slave unit is held in the second storage unit of the slave unit after the talk key is pressed. Based on the designated group number, the determination means determines whether there is an empty channel in the first channel group, and the empty channel in the first channel group, the second channel group, and / or the third channel group The channels corresponding to the designated group are sequentially transmitted to the master unit, and the control unit of the master unit selects one of the channels transmitted from the slave unit as a selected channel, and the channel between the master unit and the slave unit. The cordless telephone device according to claim 2, 3, 4, or 5, which is used for communication. 7. The control unit of the base unit determines the presence / absence of a vacant channel in the first channel group based on a designated group number held in a second storage unit of the base unit when receiving a call. Means for making a decision, and transmitting channels corresponding to the designated group of the empty channel in the first channel group, the second channel group and / or the third channel group to the slave unit in sequence for a predetermined time,
5. The channel transmitted from the master unit when a response signal from the slave unit is received is used as a selected channel for communication between the master unit and the slave unit. Alternatively, the cordless telephone device according to item 5. 8. The control means of either the master unit or the slave unit selects the designated channel belonging to the first channel group and communicates with the other of the master unit or the slave unit via the channel. As a result,
When a response signal is received from the other side within a predetermined time, it is determined that communication has been established, and the subsequent communication between the master unit and the slave unit is performed via the channel, and the response signal is transmitted from the other side for the predetermined time period. If not received within the second
5. The cordless telephone device according to claim 1, wherein a channel belonging to a channel group is selected and communication is performed with either the master unit or the slave unit. 9. The control means of either the master unit or the slave unit selects a channel belonging to the second channel group, and causes the communication to either the master unit or the slave unit via the channel. As a result, if a response signal is received from the other side within the predetermined time, it is determined that communication has been established, the subsequent communication between the master unit and the slave unit is performed through the channel, and the response signal is transmitted from the other side. 9. If the message is not received within the predetermined time, the designated channel belonging to the first channel group is selected again, and communication with either the master unit or the slave unit is performed. Cordless telephone device. 10. The plurality of channels are associated with first to Mth groups, each of which is composed of at least one channel belonging to the first channel group and one channel belonging to the second channel group. A second storage unit, which is held in a first storage unit, stores the group designation unit that designates any one of the first to Mth groups and the group information that identifies the designated group, in the master unit or the slave unit. The control means designates a channel belonging to the first channel group forming a group corresponding to the group information stored in the second storage means, requests the determination means to make a determination, and If it is determined that the channel is not being used by the other device, then the designated channel is selected; 2. The cordless telephone device according to claim 1, wherein a channel belonging to the second channel group forming a group corresponding to the group information stored in a row is selected. 11. The first to Mth groups are each 2
Including the channels belonging to the above first channel group, the control means designates the channels belonging to the first channel group forming a group corresponding to the group information stored in the second storage means, and instructs the determination means. If there is a channel that is determined to be unused and is not used by the other device among the specified channels, one of the channels determined to be unused is set.
If any one of the designated channels is used by the other device, the second channel group forming a group corresponding to the group information stored in the second storage means is selected. 11. The cordless telephone device according to claim 10, wherein a channel belonging to is selected. 12. The group specifying means of either the master unit or the slave unit is associated with a channel used for the communication during communication of the master unit or the slave unit to the other. The group information stored in the second storage means is requested to be changed to other group information that specifies one of the first to Mth groups other than the group corresponding to the group information. Yes, the control means of either the master unit or the slave unit responds to the change request by the group designating unit, and sends the information of the second storage unit to the information of the second storage unit via the channel used for the communication. It notifies either of the master unit or the slave unit that the group information is to be changed to another group information, and a response signal to the change is received from the other unit. Only in the case, the information in the second storage means is changed to the other group information, and after the change is completed,
12. The cordless system according to claim 10, wherein communication to either the master unit or the slave unit is performed via a channel belonging to the second channel group associated with the other group information. Telephone device. 13. The control means of either the master unit or the slave unit responds to the change request, and the first to the first groups other than the group corresponding to the group information stored in the second storage unit. 13. The cordless telephone device according to claim 12, wherein selection of other group information for specifying any one of the M groups is executed in a predetermined order. 14. The cordless telephone device according to claim 13, wherein the second storage unit stores the group information before the change even after the execution of the change. 15. A plurality of channels associated with each of the first to Mth groups are given a predetermined priority order, and the priority order is within the first channel group within each group. Channel and second
The control means assigned to a channel in the channel group, and the control means of either the master unit or the slave unit is not used by the other device belonging to the first channel group If a higher-ranked channel is selected and communication is made to either the master unit or the slave unit via the channel, the communication is established if a response signal is received from the other unit within a predetermined time. However, if the subsequent communication between the master unit and the slave unit is performed through the channel and the response signal is not received from the other within the predetermined time, it belongs to the first channel group and is used by the other device. Selected channels based on the above-mentioned priority order, and communication with either the master unit or the slave unit is performed. Cordless telephone apparatus according either of claims 10 to 14, characterized in that. 16. The control means of either the master unit or the slave unit selects the channel with the lowest priority and causes the communication to either the master unit or the slave unit via the channel. As a result, when the response signal is received from the other side within the predetermined time, it is determined that the communication is established, the subsequent communication between the master unit and the slave unit is performed via the channel, and the response signal is transmitted from the other side. 16. The cordless telephone device according to claim 15, wherein when the signal is not received within the predetermined time, the higher-order channel of the priority order is selected again to perform communication with either the master unit or the slave unit. . 17. The control unit requests the determination unit to make a determination regarding all channels associated with the group information stored in the second storage unit. Cordless telephone device described in either of the above.